Easy Breakfast Casserole

2 (I use more) slices cubed bread
6 eggs
2 C. milk
1# sausage, cooked
1 t. dry mustard
1 C. grated cheese
1 t. salt

Spread bread cubes over 9x13 pan. Top with cheese and sausage. Beat eggs and remaining ingredients and pour over mix. Let stand in the fridge overnight. Bake at 350 for 45 minutes.